Context:
The Texas Longhorns football program is the intercollegiate team representing the University of Texas at Austin
(variously Texas or UT) in the sport of American football. The Longhorns compete in the NCAA Division I Football
Bowl Subdivision (formerly Division I-A) as a member of the Southeastern Conference (SEC). Their home games are
played at Darrell K Royal–Texas Memorial Stadium in Austin, Texas. With over 900 wins, and an all-time win–loss
percentage of .703, the Longhorns rank 4th and 7th on the all-time wins and win–loss records lists,
respectively. Additionally, the program claims 4 national championships, 33 conference championships, 100
First Team All-Americans (62 consensus and 25 unanimous), and 2 Heisman Trophy winners.

Input:
How many Heisman Trophy winners does the Texas Longhorn Football team have?

Output:

Based on the provided context, the Texas Longhorn football program has 2 Heisman
Trophy winners. The Heisman Trophy is an award given annually to the outstanding
college football player in the United States. The two Heisman Trophy winners 
associated with the Texas Longhorns are Earl Campbell in 1977 and Ricky Williams
in 1998.